diff --git a/src/graphics/buffers.c b/src/graphics/buffers.c
index 7070204..5a17ac6 100644
--- a/src/graphics/buffers.c
+++ b/src/graphics/buffers.c
@@ -344,34 +344,32 @@ static bool compute_space_3D (int space_size_x,
         }
         if (P) printf("\n");
     };
-    /* *(line_origin + lines_ndx) = 0; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 2; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 1; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 3; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 2; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 3; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 0; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 1; lines_ndx += 1; */
-
-    /* *(line_origin + lines_ndx) = 20; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 22; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 21; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 23; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 22; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 23; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 20; lines_ndx += 1; */
-    /* *(line_origin + lines_ndx) = 21; lines_ndx += 1; */
 
     for (int u = 0; u <= space_size_x * space_size_y * 2; u ++){
-        //for (int v = 0; v <= space_size_y; v ++){
-            *(line_origin + lines_ndx) = u * 2;
-            lines_ndx += 1;
-            *(line_origin + lines_ndx) = u * 2 + 1;
-            lines_ndx += 1;
-         //   v ++;
-       //}
-        //u ++;
+        *(line_origin + lines_ndx) = u * 2;
+        lines_ndx += 1;
+        *(line_origin + lines_ndx) = u * 2 + 1;
+        lines_ndx += 1;
     }
+
+    /* *(line_origin + lines_ndx) = 0; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 2; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 1; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 3; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 2; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 3; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 0; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 1; lines_ndx += 1; */
+
+    /* *(line_origin + lines_ndx) = 20; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 22; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 21; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 23; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 22; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 23; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 20; lines_ndx += 1; */
+    /* *(line_origin + lines_ndx) = 21; lines_ndx += 1; */
+
     /* *(line_origin + lines_ndx) = 0; lines_ndx += 1; */
     /* *(line_origin + lines_ndx) = 20; lines_ndx += 1; */
 
diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index f49daa9..8da9827 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -539,8 +539,8 @@ GLubyte arrows[] = {
 
 static void get_model_data_and_user_preferences(){
 
-    model_space_size_x = 3;    //   0 < model_space_size_x
-    model_space_size_y = 2;    //   0 < model_space_size_y
+    model_space_size_x = 4;    //   0 < model_space_size_x
+    model_space_size_y = 3;    //   0 < model_space_size_y
     model_space_size_z = 1;    //   0 < model_space_size_z
     model_arrows_nb = 4; //  assert : l'emplacement des flèches est contraint
                          //  par model_space_size_x, y, z et le nombre de sites